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btrfs: Output more info for enospc_debug mount option
As one user in mail list report reproducible balance ENOSPC error, it's better to add more debug info for enospc_debug mount option. Reported-by: Marc Haber <mh+linux-btrfs@zugschlus.de> Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.com>
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parent
264813acb1
commit
0305bc2793
1 changed files with 19 additions and 2 deletions
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@ -9386,15 +9386,23 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr)
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u64 dev_min = 1;
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u64 dev_nr = 0;
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u64 target;
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int debug;
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int index;
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int full = 0;
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int ret = 0;
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debug = btrfs_test_opt(root, ENOSPC_DEBUG);
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block_group = btrfs_lookup_block_group(root->fs_info, bytenr);
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/* odd, couldn't find the block group, leave it alone */
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if (!block_group)
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if (!block_group) {
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if (debug)
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btrfs_warn(root->fs_info,
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"can't find block group for bytenr %llu",
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bytenr);
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return -1;
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}
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min_free = btrfs_block_group_used(&block_group->item);
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@ -9448,8 +9456,13 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr)
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* this is just a balance, so if we were marked as full
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* we know there is no space for a new chunk
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*/
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if (full)
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if (full) {
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if (debug)
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btrfs_warn(root->fs_info,
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"no space to alloc new chunk for block group %llu",
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block_group->key.objectid);
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goto out;
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}
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index = get_block_group_index(block_group);
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}
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@ -9496,6 +9509,10 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr)
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ret = -1;
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}
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}
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if (debug && ret == -1)
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btrfs_warn(root->fs_info,
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"no space to allocate a new chunk for block group %llu",
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block_group->key.objectid);
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mutex_unlock(&root->fs_info->chunk_mutex);
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btrfs_end_transaction(trans, root);
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out:
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